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Finding the Fourth Proportional to 714,802.19, 986,429.70 and 388,115.69

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Solution

The fourth proportional to 714,802.19, 986,429.70 and 388,115.69 is: 535,601.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,802.19 : 986,429.70 = 388,115.69 : x
  2. Step 2: Convert to fraction form
    714,802.19/986,429.70 = 388,115.69/x
  3. Step 3: Cross multiply
    714,802.19x = 986,429.70 × 388,115.69
  4. Step 4: Simplify right side
    714,802.19x = 382,848,838,719.85
  5. Step 5: Solve for x
    x = 382,848,838,719.85/714,802.19
  6. Step 6: Final answer
    x = 535,601.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.